package ai.kastrax.codebase.retrieval.context

// TODO: 暂时注释掉，等待依赖问题解决

// 空实现以避免语法错误
class ContextBuilder

/*
import ai.kastrax.codebase.semantic.CodeSemanticAnalyzer
import ai.kastrax.codebase.semantic.model.CodeElement
import ai.kastrax.codebase.semantic.model.CodeElementType
import ai.kastrax.codebase.symbol.SymbolGraphBuilder
import ai.kastrax.codebase.symbol.model.SymbolGraph
import ai.kastrax.codebase.symbol.model.SymbolNode
import ai.kastrax.codebase.symbol.model.SymbolType
import io.github.oshai.kotlinlogging.KotlinLogging
import kotlinx.coroutines.Dispatchers
import kotlinx.coroutines.async
import kotlinx.coroutines.awaitAll
import kotlinx.coroutines.coroutineScope
import kotlinx.coroutines.flow.MutableSharedFlow
import kotlinx.coroutines.flow.SharedFlow
import kotlinx.coroutines.flow.asSharedFlow
import kotlinx.coroutines.withContext
import java.nio.file.Path
import java.util.UUID
import java.util.concurrent.ConcurrentHashMap
import java.util.concurrent.atomic.AtomicBoolean
import kotlin.io.path.exists
import kotlin.io.path.isDirectory
import kotlin.io.path.name

private val logger = KotlinLogging.logger {}

/**
 * 上下文构建器配置
 *
 * @property maxConcurrentTasks 最大并发任务数
 * @property enableEventNotifications 是否启用事件通知
 * @property includeDocumentation 是否包含文档
 * @property includeComments 是否包含注释
 * @property includeHistory 是否包含历史
 * @property maxHistorySize 最大历史大小
 */
data class ContextBuilderConfig(
    val maxConcurrentTasks: Int = 10,
    val enableEventNotifications: Boolean = true,
    val includeDocumentation: Boolean = true,
    val includeComments: Boolean = true,
    val includeHistory: Boolean = true,
    val maxHistorySize: Int = 10
)

/**
 * 上下文构建器事件类型
 */
enum class ContextBuilderEventType {
    INITIALIZED,
    CONTEXT_ADDED,
    CONTEXT_UPDATED,
    CONTEXT_REMOVED,
    BUILDING_STARTED,
    BUILDING_COMPLETED,
    BUILDING_FAILED,
    ERROR
}

/**
 * 上下文构建器事件
 *
 * @property type 事件类型
 * @property message 事件消息
 * @property data 事件数据
 */
data class ContextBuilderEvent(
    val type: ContextBuilderEventType,
    val message: String,
    val data: Map<String, Any> = emptyMap()
)

/**
 * 上下文构建器
 *
 * 用于构建和管理多级上下文
 *
 * @property semanticAnalyzer 代码语义分析器
 * @property symbolGraphBuilder 符号关系图构建器
 * @property config 配置
 */
class ContextBuilder(
    private val semanticAnalyzer: CodeSemanticAnalyzer,
    private val symbolGraphBuilder: SymbolGraphBuilder,
    private val config: ContextBuilderConfig = ContextBuilderConfig()
) {
    // 上下文层次结构
    private val contextHierarchy = ContextHierarchy("codebase-context")

    // 路径到上下文 ID 的映射
    private val pathToContextId = ConcurrentHashMap<String, String>()

    // 符号 ID 到上下文 ID 的映射
    private val symbolToContextId = ConcurrentHashMap<String, String>()

    // 查询历史
    private val queryHistory = ConcurrentHashMap<String, MutableList<String>>()

    // 事件流
    private val _events = MutableSharedFlow<ContextBuilderEvent>(replay = 0)
    val events: SharedFlow<ContextBuilderEvent> = _events.asSharedFlow()

    // 是否已初始化
    private val initialized = AtomicBoolean(false)

    /**
     * 初始化构建器
     */
    suspend fun initialize() = withContext(Dispatchers.IO) {
        if (initialized.getAndSet(true)) {
            logger.info { "上下文构建器已经初始化" }
            return@withContext
        }

        logger.info { "初始化上下文构建器" }

        try {
            // 清空上下文层次结构
            contextHierarchy.clear()

            // 清空映射
            pathToContextId.clear()
            symbolToContextId.clear()

            // 发送初始化事件
            emitEvent(
                ContextBuilderEventType.INITIALIZED,
                "上下文构建器初始化完成"
            )
        } catch (e: Exception) {
            logger.error(e) { "初始化上下文构建器失败: ${e.message}" }

            // 发送错误事件
            emitEvent(
                ContextBuilderEventType.ERROR,
                "初始化上下文构建器失败: ${e.message}",
                mapOf("error" to e)
            )

            throw e
        }
    }

    /**
     * 构建代码库上下文
     *
     * @param path 代码库路径
     * @return 是否成功构建
     */
    suspend fun buildCodebaseContext(path: Path): Boolean = withContext(Dispatchers.IO) {
        try {
            // 确保已初始化
            if (!initialized.get()) {
                initialize()
            }

            // 检查路径是否存在
            if (!path.exists() || !path.isDirectory()) {
                throw IllegalArgumentException("路径不存在或不是目录: $path")
            }

            // 发送构建开始事件
            emitEvent(
                ContextBuilderEventType.BUILDING_STARTED,
                "开始构建代码库上下文: $path",
                mapOf("path" to path)
            )

            // 分析代码库
            val codebase = semanticAnalyzer.analyzeCodebase(path)

            // 构建符号图
            val graph = symbolGraphBuilder.buildGraph(codebase)

            // 构建上下文层次结构
            val success = buildContextHierarchy(codebase, graph)

            if (success) {
                // 发送构建完成事件
                emitEvent(
                    ContextBuilderEventType.BUILDING_COMPLETED,
                    "构建代码库上下文完成: $path",
                    mapOf("path" to path)
                )
            } else {
                // 发送构建失败事件
                emitEvent(
                    ContextBuilderEventType.BUILDING_FAILED,
                    "构建代码库上下文失败: $path",
                    mapOf("path" to path)
                )
            }

            return@withContext success
        } catch (e: Exception) {
            logger.error(e) { "构建代码库上下文失败: $path, ${e.message}" }

            // 发送构建失败事件
            emitEvent(
                ContextBuilderEventType.BUILDING_FAILED,
                "构建代码库上下文失败: $path, ${e.message}",
                mapOf("error" to e, "path" to path)
            )

            return@withContext false
        }
    }

    /**
     * 构建上下文层次结构
     *
     * @param codebase 代码库
     * @param graph 符号图
     * @return 是否成功构建
     */
    private suspend fun buildContextHierarchy(
        codebase: CodeElement,
        graph: SymbolGraph
    ): Boolean = withContext(Dispatchers.IO) {
        try {
            // 创建全局上下文
            val globalContextId = "global"
            val globalContext = ContextElement(
                id = globalContextId,
                level = ContextLevel.GLOBAL,
                type = ContextType.CODE,
                content = "Global Context: ${codebase.name}"
            )

            // 添加全局上下文
            contextHierarchy.addContext(globalContext)

            // 创建项目上下文
            val projectContextId = "project-${UUID.randomUUID()}"
            val projectContext = ContextElement(
                id = projectContextId,
                level = ContextLevel.PROJECT,
                type = ContextType.CODE,
                content = "Project Context: ${codebase.name}",
                path = codebase.location.filePath
            )

            // 添加项目上下文
            contextHierarchy.addContext(projectContext, globalContextId)

            // 添加路径映射
            pathToContextId[codebase.location.filePath.toString()] = projectContextId

            // 处理子元素
            processCodeElements(codebase.children, projectContextId, graph)

            return@withContext true
        } catch (e: Exception) {
            logger.error(e) { "构建上下文层次结构失败: ${e.message}" }
            return@withContext false
        }
    }

    /**
     * 处理代码元素
     *
     * @param elements 代码元素列表
     * @param parentContextId 父上下文 ID
     * @param graph 符号图
     */
    private suspend fun processCodeElements(
        elements: List<CodeElement>,
        parentContextId: String,
        graph: SymbolGraph
    ) = coroutineScope {
        // 并行处理代码元素
        elements.chunked(config.maxConcurrentTasks).forEach { chunk ->
            chunk.map { element ->
                async {
                    processCodeElement(element, parentContextId, graph)
                }
            }.awaitAll()
        }
    }

    /**
     * 处理代码元素
     *
     * @param element 代码元素
     * @param parentContextId 父上下文 ID
     * @param graph 符号图
     * @return 上下文 ID
     */
    private suspend fun processCodeElement(
        element: CodeElement,
        parentContextId: String,
        graph: SymbolGraph
    ): String? = withContext(Dispatchers.IO) {
        try {
            // 确定上下文级别
            val level = when (element.type) {
                CodeElementType.MODULE -> ContextLevel.MODULE
                CodeElementType.PACKAGE -> ContextLevel.PACKAGE
                CodeElementType.FILE -> ContextLevel.FILE
                CodeElementType.CLASS, CodeElementType.INTERFACE, CodeElementType.ENUM, CodeElementType.ANNOTATION -> ContextLevel.CLASS
                CodeElementType.METHOD, CodeElementType.CONSTRUCTOR -> ContextLevel.METHOD
                CodeElementType.FIELD, CodeElementType.PROPERTY, CodeElementType.PARAMETER, CodeElementType.LOCAL_VARIABLE -> ContextLevel.LOCAL
                else -> null
            } ?: return@withContext null

            // 创建上下文 ID
            val contextId = "${level.name.lowercase()}-${UUID.randomUUID()}"

            // 创建上下文内容
            val content = buildString {
                append("${element.type.name.lowercase()} ${element.name}")

                if (element.qualifiedName.isNotEmpty()) {
                    append("\nQualified Name: ${element.qualifiedName}")
                }

                if (config.includeDocumentation && element.documentation.isNotEmpty()) {
                    append("\nDocumentation: ${element.documentation}")
                }

                if (config.includeComments && element.comments.isNotEmpty()) {
                    append("\nComments:")
                    element.comments.forEach { comment ->
                        append("\n- $comment")
                    }
                }

                if (element.type == CodeElementType.FILE && element.content.isNotEmpty()) {
                    append("\nContent: ${element.content.take(1000)}")
                    if (element.content.length > 1000) {
                        append("...")
                    }
                }
            }

            // 创建上下文元素
            val contextElement = ContextElement(
                id = contextId,
                level = level,
                type = ContextType.CODE,
                content = content,
                path = element.location.filePath
            )

            // 添加上下文
            contextHierarchy.addContext(contextElement, parentContextId)

            // 添加路径映射
            pathToContextId[element.location.filePath.toString()] = contextId

            // 查找对应的符号节点
            val symbolNode = findSymbolForElement(element, graph)

            // 添加符号映射
            if (symbolNode != null) {
                symbolToContextId[symbolNode.id] = contextId
            }

            // 处理子元素
            if (element.children.isNotEmpty()) {
                processCodeElements(element.children, contextId, graph)
            }

            return@withContext contextId
        } catch (e: Exception) {
            logger.error(e) { "处理代码元素失败: ${element.name}, ${e.message}" }
            return@withContext null
        }
    }

    /**
     * 查找元素对应的符号
     *
     * @param element 代码元素
     * @param graph 符号图
     * @return 符号节点
     */
    private fun findSymbolForElement(element: CodeElement, graph: SymbolGraph): SymbolNode? {
        // 根据元素类型确定符号类型
        val symbolType = when (element.type) {
            CodeElementType.CLASS -> SymbolType.CLASS
            CodeElementType.INTERFACE -> SymbolType.INTERFACE
            CodeElementType.ENUM -> SymbolType.ENUM
            CodeElementType.ANNOTATION -> SymbolType.ANNOTATION
            CodeElementType.METHOD -> SymbolType.METHOD
            CodeElementType.CONSTRUCTOR -> SymbolType.CONSTRUCTOR
            CodeElementType.FIELD -> SymbolType.FIELD
            CodeElementType.PROPERTY -> SymbolType.PROPERTY
            CodeElementType.PARAMETER -> SymbolType.PARAMETER
            CodeElementType.PACKAGE -> SymbolType.PACKAGE
            CodeElementType.MODULE -> SymbolType.MODULE
            else -> null
        } ?: return null

        // 查找符号
        return graph.findNodesByQualifiedName(element.qualifiedName)
            .firstOrNull { it.type == symbolType }
    }

    /**
     * 添加查询上下文
     *
     * @param query 查询文本
     * @param sessionId 会话 ID
     * @return 上下文 ID
     */
    suspend fun addQueryContext(query: String, sessionId: String): String = withContext(Dispatchers.IO) {
        try {
            // 创建上下文 ID
            val contextId = "query-${UUID.randomUUID()}"

            // 获取查询历史
            val history = queryHistory.computeIfAbsent(sessionId) { mutableListOf() }

            // 添加查询到历史
            history.add(query)

            // 如果历史超过最大大小，移除最早的查询
            if (history.size > config.maxHistorySize) {
                history.removeAt(0)
            }

            // 创建上下文内容
            val content = buildString {
                append("Query: $query")

                if (config.includeHistory && history.isNotEmpty()) {
                    append("\nQuery History:")
                    history.takeLast(config.maxHistorySize).forEach { historyQuery ->
                        append("\n- $historyQuery")
                    }
                }
            }

            // 创建上下文元素
            val contextElement = ContextElement(
                id = contextId,
                level = ContextLevel.GLOBAL,
                type = ContextType.QUERY,
                content = content,
                metadata = mutableMapOf("sessionId" to sessionId)
            )

            // 添加上下文
            contextHierarchy.addContext(contextElement)

            // 发送上下文添加事件
            emitEvent(
                ContextBuilderEventType.CONTEXT_ADDED,
                "添加查询上下文: $query",
                mapOf("contextId" to contextId, "query" to query)
            )

            return@withContext contextId
        } catch (e: Exception) {
            logger.error(e) { "添加查询上下文失败: $query, ${e.message}" }

            // 发送错误事件
            emitEvent(
                ContextBuilderEventType.ERROR,
                "添加查询上下文失败: $query, ${e.message}",
                mapOf("error" to e, "query" to query)
            )

            return@withContext ""
        }
    }

    /**
     * 添加用户反馈上下文
     *
     * @param memoryId 记忆 ID
     * @param score 分数
     * @param comment 评论
     * @param sessionId 会话 ID
     * @return 上下文 ID
     */
    suspend fun addFeedbackContext(
        memoryId: String,
        score: Double,
        comment: String? = null,
        sessionId: String = "default"
    ): String = withContext(Dispatchers.IO) {
        try {
            // 创建上下文 ID
            val contextId = "feedback-${UUID.randomUUID()}"

            // 创建上下文内容
            val content = buildString {
                append("Feedback for Memory: $memoryId")
                append("\nScore: $score")

                if (!comment.isNullOrEmpty()) {
                    append("\nComment: $comment")
                }
            }

            // 创建上下文元素
            val contextElement = ContextElement(
                id = contextId,
                level = ContextLevel.GLOBAL,
                type = ContextType.USER_FEEDBACK,
                content = content,
                metadata = mutableMapOf(
                    "sessionId" to sessionId,
                    "memoryId" to memoryId,
                    "score" to score
                )
            )

            // 添加上下文
            contextHierarchy.addContext(contextElement)

            // 发送上下文添加事件
            emitEvent(
                ContextBuilderEventType.CONTEXT_ADDED,
                "添加用户反馈上下文: $memoryId",
                mapOf("contextId" to contextId, "memoryId" to memoryId)
            )

            return@withContext contextId
        } catch (e: Exception) {
            logger.error(e) { "添加用户反馈上下文失败: $memoryId, ${e.message}" }

            // 发送错误事件
            emitEvent(
                ContextBuilderEventType.ERROR,
                "添加用户反馈上下文失败: $memoryId, ${e.message}",
                mapOf("error" to e, "memoryId" to memoryId)
            )

            return@withContext ""
        }
    }

    /**
     * 添加自定义上下文
     *
     * @param level 上下文级别
     * @param type 上下文类型
     * @param content 上下文内容
     * @param path 路径
     * @param parentId 父上下文 ID
     * @param metadata 元数据
     * @return 上下文 ID
     */
    suspend fun addCustomContext(
        level: ContextLevel,
        type: ContextType,
        content: String,
        path: Path? = null,
        parentId: String? = null,
        metadata: Map<String, Any> = emptyMap()
    ): String = withContext(Dispatchers.IO) {
        try {
            // 创建上下文 ID
            val contextId = "custom-${UUID.randomUUID()}"

            // 创建上下文元素
            val contextElement = ContextElement(
                id = contextId,
                level = level,
                type = type,
                content = content,
                path = path,
                metadata = metadata.toMutableMap()
            )

            // 添加上下文
            val success = contextHierarchy.addContext(contextElement, parentId)

            if (success) {
                // 添加路径映射
                if (path != null) {
                    pathToContextId[path.toString()] = contextId
                }

                // 发送上下文添加事件
                emitEvent(
                    ContextBuilderEventType.CONTEXT_ADDED,
                    "添加自定义上下文: $contextId",
                    mapOf("contextId" to contextId)
                )

                return@withContext contextId
            } else {
                return@withContext ""
            }
        } catch (e: Exception) {
            logger.error(e) { "添加自定义上下文失败: ${e.message}" }

            // 发送错误事件
            emitEvent(
                ContextBuilderEventType.ERROR,
                "添加自定义上下文失败: ${e.message}",
                mapOf("error" to e)
            )

            return@withContext ""
        }
    }

    /**
     * 更新上下文
     *
     * @param contextId 上下文 ID
     * @param content 上下文内容
     * @param metadata 元数据
     * @return 是否成功更新
     */
    suspend fun updateContext(
        contextId: String,
        content: String? = null,
        metadata: Map<String, Any>? = null
    ): Boolean = withContext(Dispatchers.IO) {
        try {
            // 获取上下文
            val context = contextHierarchy.getContext(contextId) ?: return@withContext false

            // 创建更新后的上下文
            val updatedContext = context.copy(
                content = content ?: context.content,
                metadata = if (metadata != null) {
                    context.metadata.apply { putAll(metadata) }
                } else {
                    context.metadata
                }
            )

            // 移除旧上下文
            contextHierarchy.removeContext(contextId)

            // 添加更新后的上下文
            val success = contextHierarchy.addContext(updatedContext, updatedContext.parent?.id)

            if (success) {
                // 发送上下文更新事件
                emitEvent(
                    ContextBuilderEventType.CONTEXT_UPDATED,
                    "更新上下文: $contextId",
                    mapOf("contextId" to contextId)
                )
            }

            return@withContext success
        } catch (e: Exception) {
            logger.error(e) { "更新上下文失败: $contextId, ${e.message}" }

            // 发送错误事件
            emitEvent(
                ContextBuilderEventType.ERROR,
                "更新上下文失败: $contextId, ${e.message}",
                mapOf("error" to e, "contextId" to contextId)
            )

            return@withContext false
        }
    }

    /**
     * 移除上下文
     *
     * @param contextId 上下文 ID
     * @return 是否成功移除
     */
    suspend fun removeContext(contextId: String): Boolean = withContext(Dispatchers.IO) {
        try {
            // 获取上下文
            val context = contextHierarchy.getContext(contextId) ?: return@withContext false

            // 移除上下文
            val success = contextHierarchy.removeContext(contextId)

            if (success) {
                // 移除路径映射
                if (context.path != null) {
                    pathToContextId.remove(context.path.toString())
                }

                // 发送上下文移除事件
                emitEvent(
                    ContextBuilderEventType.CONTEXT_REMOVED,
                    "移除上下文: $contextId",
                    mapOf("contextId" to contextId)
                )
            }

            return@withContext success
        } catch (e: Exception) {
            logger.error(e) { "移除上下文失败: $contextId, ${e.message}" }

            // 发送错误事件
            emitEvent(
                ContextBuilderEventType.ERROR,
                "移除上下文失败: $contextId, ${e.message}",
                mapOf("error" to e, "contextId" to contextId)
            )

            return@withContext false
        }
    }

    /**
     * 获取上下文
     *
     * @param contextId 上下文 ID
     * @return 上下文元素
     */
    fun getContext(contextId: String): ContextElement? {
        return contextHierarchy.getContext(contextId)
    }

    /**
     * 根据路径获取上下文
     *
     * @param path 路径
     * @return 上下文元素
     */
    fun getContextByPath(path: Path): ContextElement? {
        val contextId = pathToContextId[path.toString()] ?: return null
        return contextHierarchy.getContext(contextId)
    }

    /**
     * 根据符号获取上下文
     *
     * @param symbolId 符号 ID
     * @return 上下文元素
     */
    fun getContextBySymbol(symbolId: String): ContextElement? {
        val contextId = symbolToContextId[symbolId] ?: return null
        return contextHierarchy.getContext(contextId)
    }

    /**
     * 获取上下文层次结构
     *
     * @return 上下文层次结构
     */
    fun getContextHierarchy(): ContextHierarchy {
        return contextHierarchy
    }

    /**
     * 获取所有上下文
     *
     * @return 上下文列表
     */
    fun getAllContexts(): List<ContextElement> {
        return contextHierarchy.getAllContexts()
    }

    /**
     * 获取指定级别的上下文
     *
     * @param level 上下文级别
     * @return 上下文列表
     */
    fun getContextsByLevel(level: ContextLevel): List<ContextElement> {
        return contextHierarchy.getContextsByLevel(level)
    }

    /**
     * 获取指定类型的上下文
     *
     * @param type 上下文类型
     * @return 上下文列表
     */
    fun getContextsByType(type: ContextType): List<ContextElement> {
        return contextHierarchy.getContextsByType(type)
    }

    /**
     * 查找上下文
     *
     * @param predicate 断言函数
     * @return 上下文列表
     */
    fun findContexts(predicate: (ContextElement) -> Boolean): List<ContextElement> {
        return contextHierarchy.findContexts(predicate)
    }

    /**
     * 清空上下文
     */
    fun clearContexts() {
        contextHierarchy.clear()
        pathToContextId.clear()
        symbolToContextId.clear()
        queryHistory.clear()
    }

    /**
     * 获取统计信息
     *
     * @return 统计信息
     */
    fun getStats(): Map<String, Any> {
        return contextHierarchy.getStats()
    }

    /**
     * 发送事件
     *
     * @param type 事件类型
     * @param message 事件消息
     * @param data 事件数据
     */
    private suspend fun emitEvent(
        type: ContextBuilderEventType,
        message: String,
        data: Map<String, Any> = emptyMap()
    ) {
        if (!config.enableEventNotifications) {
            return
        }

        try {
            val event = ContextBuilderEvent(type, message, data)
            _events.emit(event)
        } catch (e: Exception) {
            logger.error(e) { "发送事件失败: $type, $message, ${e.message}" }
        }
    }
}
*/
